Water → 2-Cyclopenten-1-one, 4-hydroxy-3-methyl-2-(2-propenyl)-, (S)-

Participants

Reaction Steps

A mixture of 1.97 g of (R)-3-methyl-4-nitroxy-2-(2-propenyl)-2-cyclopenten-1-one prepared in Example 10, 0.20 g of calcium carbonate and 30 ml of water was stirred at 85°-90° C. for 3 hours. Thereafter, with the same operations as in Example 3, 1.20 g of (S)-4-hydroxy-3-methyl-2-(2-propenyl)-2-cyclopenten-1-one (chemical purity: 93.6%, [α]D24 : +11.2° (C=1.23, in chloroform), (R)-isomer/(S)-isomer=14.8/85.2) was obtained.

Provenance & Evidence